CAJ | 학술논문

对DPF的压降特性进行了理论和仿真分析，阐明了压降产生的机理，指出DPF的压降主要由可视为多孔介质的载体壁面和炭烟层及载体的入口通道和出口通道的摩擦造成，且压降历程与炭烟捕集过程相似，分为3个阶段。在深床过滤阶段，载体壁面渗透率随炭烟的积累迅速减小，DPF压降迅速增大，当壁面达到饱和时，饼状层单独起到捕集炭烟的作用，且炭烟层的渗透率保持不变，DPF压降上升趋缓。由壁面带来的压降占压降的绝大部分。
대DPF적압강특성진행료이론화방진분석，천명료압강산생적궤리，지출DPF적압강주요유가시위다공개질적재체벽면화탄연층급재체적입구통도화출구통도적마찰조성，차압강역정여탄연포집과정상사，분위3개계단。재심상과려계단，재체벽면삼투솔수탄연적적루신속감소，DPF압강신속증대，당벽면체도포화시，병상층단독기도포집탄연적작용，차탄연층적삼투솔보지불변，DPF압강상승추완。유벽면대래적압강점압강적절대부분。
The theoretical and simulation analysis of DPF pressure drop characteristics were carried out and the mechanism of pressure drop was clarified .It was pointed out that the pressure drop of DPF was the result of the gas flow blocked by the multi-hole carrier wall ,soot layer and inlet and outlet channel .Similar to the process of soot collection ,the process of pressure drop consisted of three phases .In the phase of deep bed collection ,the wall penetration rate decreased rapidly with the accumu-lation of soot and the pressure drop of DPF increased .When the wall reached the saturation ,the cake-shaped layer collected the soot alone ,the penetration rate of soot layer kept the same and the pressure drop increased slowly .The pressure drop caused by the wall accounted for the main part .